Mixing-machine.



No. 872,610 PATENTED DEC. 3, 1907..

R. N. CUNNINGHAM & J. W. MOPHERSON.

MIXING MACHINE.

APPLICATION FILED 114x31, 1906.

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. PATENTBD DEC. 3, 1907'.

R. N. CUNNINGHAM & J. W. MOPHERSON.

MIXING MACHINE.

APPLIUATION FILED MAR. a1, 1906.

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ASHINGTON. Dv c No. 872,610. PATENTED DEC. 3, l90' 7 R. N. CUNNINGHAM & J. W. MOPHERSON.

' MIXING MACHINE. APPLIGATIGN FILED MAR.'81,1906.

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WITNESSES ORNEY WWW 1n: NORRIS PETERS no, wllsw-lcrom-m c,

UNITED STATES PATENT OFFICE.

ROY N. CUNNINGHAM AND JOHN W. MOPHERSON, OF COLUMBUS, OHIO, ASSIGNORS TO THE AMERICAN CONCRETE MACHINERY COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF on o.

MIXING-MACHINE.

Patented Dec. 3, 1907.

To all whom it may concern:

Be, it known that we, ROY N. CUNNINGHAM and JOHN W. McPHnRsoN, citizens of the United States, residing at Columbus, in the county of Franklin and State of. Ohio, have invented certain new and useful Improvements in Mixing-Machines, of Which the following is a specification.

Our invention relates to new and useful improvements in mixing machines.

The object of the invention is to provide a simple machine of superior construction and one involving certain improvements on our mixing machine for which Letters Patent were issued October 18th, 1904, and numbered 772,697.

One of the principal features of our improved machine is the provision of a detachable wearing plate and reinforced ends for the drum. Also certain improvements in the plows and the discharging or dumping mechanism, together with a hopper and a grating therefor.

Finally the object of the invention is to provide adevice of the character described that will be strong, durable and eflicient, simple and comparatively inexpensive to construct, and one in which the several parts will not be liable to get out of working order.

With the above and other objects in view, the invention consists of the novel details of construction and operation, a preferable embodiment of which is described in the speciflcation in the accompanying drawings, wherein: V

Figure 1 is a plan view of the machine, the hopper being omitted, Fig. 2 is a side elevation, portions of the frame being broken away, Fig. 3 is a transverpe sectional view of the drum showing some of the plows in elevation and illustrating the drum in its discharging position in dotted lines. Fig. 4 is a transverse vertical sectional view of one of the drum end plates, Fig. 5 is a perspective view of the plows and shaft, and Fig. 6 is a plan view of the hopper and grating.

In the drawings the numeral 1, designates a frame which may be either portable or stationary and is formed of longitudinal sills 2 and beams 3 and transverse sills 4. The frame is braced by vertical posts 5 and 6, between which latter braces 7 extend up from the sills 2 and join beneath the beams 3, a beam 8 extending transversely between the beams 3 at the point of connection with the braces 7.

Bearing boxes 9 are mounted on the beams 3 near one end of the frame 1 and support sleeves 10 formed integral with annular flanges 11. The flanges 11 are secured to cast end plates 12 of a drum 14,

which is thus mounted to oscillate between i the beams 3. The drum 14 is partially cylindrical in shape and is rovided with a flaring mouth 15. The on plates 12 are formed with outwardly directed notched and reinforced flanges 16, which receive the drum sheets 17 and 17, the latter constituting the sides of the drum. Between the sheets 17 and 17 a and connecting the same, is a curved wearing plate 18 forming the bottom of the drum. Both the sheets 17 and 17 and the wearing plate 18 are detachably fastened on the flanges 16 by bolts 19 engaging in the notched portions of the said flanges. These sheets and Wearing plate are connected by transverse outside plates 54 which are secured to the parts by countersunk bolts 55. Considerable trouble has been experienced in the wearing out of the drum sheets so that by removably fastening the sheets they may be readily replaced. It has also been found that the greatest wear takes place at the bottom of the drum, so that by the provision of the wearing plate 18, which is formed of heavy steel, this trouble is reduced to a minimum and the life of the drum greatly prolonged. By simply removing the bolts 19 and 55, the sheets 17 and 17 01' the wearing. plate 18 may be removed and replaced without disturbing each other or any of the other parts of the drum. Attention is also called to the cast end plates 12 which greatly strengthen the drum and preventing bulging, as well as providing a rigid support for the sheets and wearing plate.

A plow shaft 20 extends centrally through and longitudinally of the drum being supported in the sleeves 10 of the flanges 11 hereinbefore referred to. The shaft 20 is mounted to revolve independently of the drum which is held against movement by means hereinafter described. On the shaft 20 a plurality of collars 21, preferably four in number, are fixed, and from opposite sides of these collars 21-integral plow arms 22 extend. The collars 21 are set so that the arms of the outer or end ones extend in substantially the same plane, while the arms 22 of the inner or central collars, extend at right angles to the first named arms. The arms also project at substantially right angles to theshaft 2O thus being set on the quarter with respect to their revolution.

On the outer ends of the end arms plows or blades 23 are adjustably mounted. The arms are given a slight twist so that the plows stand at an angle and incline toward the end plates 12 and terminate in close proximity thereto. The plows 23 are flat and have their outer edges curved to conform to the contour of the inner periphery of the drum. On the outer ends of the inner arms which are likewise given a slight twist I flat plow blades 24 are adjustably mounted.

The arms projecting at right angles to the outer arms permit the plows 24 to stand under and over the plows 23. These plows 23 are also set at an angle and incline toward each other and in opposite directions to their adjacent end plows. The adjacent ends of the center plows 24 terminate in close proximity and at substantially the center of the drum 14. The outer edges of the plows 24 are curved to conform to the contour of the drum.

It will be apparent that the plows 24 being ositioned at a quadrant to the plows 23 and inclining toward the same, will follow them and catch the batch therefrom, turning it over and throwing it onto the following outer plows 23, which latter inclining toward the inner plows 24, will receive the batch, turn it over and throw it onto the following inner plows as in the first instance. In this manner the mixture is effected by turning the materials over and over and thoroughly intermingling the same instead merely rolling them around the drum. The curved edges of the plows revolving in close proximity to the inner periphery and ends of the drum, continually scrape the material therefrom, thus keeping the inner surfaces free from deposits and accumulations at all times. The arms and plows are constructed of such size and material, as to withstand hard usage and breakage from stones or other obstructions feed into the drum.

When the drum is in its normal position, the mouth 15 is directed upwardly as shown in Fig. 3. Over the drum and the mouth thereof, a hopper 25 is mounted, being supported upon side frames 26 mounted on the beams 3 as shown in Fig. 2. In the corners of the hopper 25, brackets 27 are arranged and support in the bottom of the hopper, a grating and guard 28 which prevents large stones falling or being thrown into the drum, or workman from accidentally stepping into the drum.

For revolving theplows, a large sprocket wheel 56 is keyed on the shaft 20 outside of.

the bearing box 9 and is connected to a small sprocket wheel 29 by a sprocket chain 30. The small sprocket 26 is keyed on a counter shaft 32 mounted in bearing boxes 31 secured on the sides of the posts 6. Near its opposite end and inside of the posts a large gear wheel 33 is loosely mounted on the counter-shaft 32 and carries a clutch mem ber 34, which is adapted to be engaged by a sliding clutch member 35 splined on the shaft and operated by a suitable lever 36, so that the plow revolving mechanism may be thrown into and out of operation at will. Motion is imparted to the large gear wheel 33 by any suitable means, such as a pinion 37 keyed on a drive shaft 38 mounted in bearing boxes 39 supported on the beams 3. The shaft 38 carries a pulley 40 which may be connected to any suitable form of power means. the right and through its pinion 37 drives the counter-shaft 32 to the left, which by means of the sprockets 29 and 56 and the sprocket chain 30, revolves the shaft 20 and the plows 23 and 24 to the right.

For dumping or discharging the drum after the batch is mixed, the end of a chain or other flexible connection 41 is secured to the outer side of the drum sheet 17 at the center of the drum and passed therebeneath. The 0 posite end of the chain is secured to a spoo l 42 loosely mounted on the shaft 32. A suitable clutch 43, also mounted on the shaft 32 is controlled by a vertical lever 44 and when operated by the latter transmits motion from the shaft to the spool 42, thus winding the chain thereon and throwing the drum 14 downward to its discharging position as shown in dotted lines in Fig. 3. The drum is normally held against movement by a stop bar 45 secured across the drum sheet 17 and contacting with the upper sides of the beams 3. Across one end of this bar 45 a spring latch 46 projects, the latter being mounted in a bracket 47 secured on the beam 3, as shown in Fig. 1. The latch is withdrawn by a rod 48 secured thereto and to a bell-crank lever 49 pivoted on a bracket 50 mounted on the inner side of the post 6. This bell-crank lever is connected to the clutch lever 44 by "a rod 51. In this way when the lever 44 is forced toward the spool 42 to operate the clutch 43, the bell-crank lever 49 is rocked, withdrawing the latch 46 and permitting the spool 42 and chain 41 to rock the drum downward and in a direction opposite to the direction of revolution of the plows 23 and 24. When pressure is relieved on the lever 44, the drum is returned to its normal position by a weight 52 secured to its bottom and the chain unwound from the spool which is free to rotate. When the drum is returned to its normal position, the stop bar 45 abuts the beams 3 and engages under the spring latch 46, arresting and hold- The drive shaft 38 is rotated froming the drum at the proper point to receive the load.

It is to be noted that the drum moving in a direction opposite to the direction of revolution of the plows 23 and 24, the latter act to eject the mixed batch from the drum through its mouth 15, at the same time cleaning the drum and discharging the entire batch. By counter-sinking the heads of the bolts 55, the interior of the drum is rendered extremely smooth, so that all recesses and obstruction conducive to collections and deposits of the materials mixed. are obviated.

I/Ve wish to call attention to the flat plows 23 and 24 which we have substituted for the curved single and double plows embodied in our machine hereinbefore mentioned. It is to be further noted that instead of a double center plow, we have shown two center plows flaring or diverging from each other and inclining toward the end or outer plows. By provision of flat plows the materials are more quickly turned over and not thrown so far as where curved plows are used; thus more thoroughly and efficiently mixing the batch.

What we claim is:

1. In a device of the character described, the combination with a supporting frame of a drum mounted to rock in said frame, a shaft which extends through said drum, means for rotatin said shaft, a pair of oppositely inclined fiat faced plows mounted upon said shaft and having bodily rotation therewith, said plows traveling overthe inner face of the drum and throwing the material toward the sides of the drum, flat faced plows inclined at such an angle as to throw the material toward the center of the drum, said latter plows also bein mounted upon said shaft and having bodily rotation therewith and said latter plows following the first named plows, means for rocking the drum in a direction opposite to the rotation of the shaft, and means for driving said latter means from the driving mechanism of said shaft.

2. In a device of the character described, the combination with a supporting frame, of a shaft mounted in said supporting frame, a drum freely mounted to rock on said shaft,

mixing plows mounted upon said shaft, means for driving said shaft, a spool mounted for rotation in the supportingframe, aflexible connection between said spoolgand said drum, said flexible connection being adapted when wound upon said spool to turn said drum over, said spool being driven by the mechanism which drives the plow shaft.

3. In a device of the character described, the combination with a supporting frame, of a shaft mounted in said supporting frame, a drum freely mounted to rock upon said shaft, mixing plows ,mounted upon said shaft, means for driving said shaft, a spool mounted for rotation in said supportin frame, a flexible connection between sai spool and said drum, said flexible connection being adapted when wound upon said spool to turn said drum over, said spool being driven by the mechanism which drives the plow shaft, a locking mechanism for said drum, and a member the movement of which simultaneously actuates said locking mechanism to release the drum and to set said spool in action to rock said drum.

4. In a device of the character described, the combination with a supporting frame, of a shaft mounted in said supporting frame, means for driving said shaft, a plow shaft mounted in the supporting frame, a drum freely mounted to rock upon said plow shaft, means for imparting movement from the first named shaft to the plow shaft, a support mounted upon said first named shaft, a looking mechanism for the drum, a connection between said drum and said spool and a member the movement of which is adapted to simultaneously release said drum and throw said spool into connection with said shaft to thereby impart rotation to said spool from said shaft and wind said member upon said spool to rock the drum.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ROY N. CUNNINGHAM. JOHN W. MOPHERSON. Witnesses:

S. A. SCHLEY, M. B. ScI-ILEY. 

